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# holidays
# --------
# A fast, efficient Python library for generating country, province and state
# specific sets of holidays on the fly. It aims to make determining whether a
# specific date is a holiday as fast and flexible as possible.
#
# Authors: Vacanza Team and individual contributors (see CONTRIBUTORS file)
# dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023
# ryanss <ryanssdev@icloud.com> (c) 2014-2017
# Website: https://github.com/vacanza/holidays
# License: MIT (see LICENSE file)
from __future__ import annotations
from gettext import gettext as tr
from typing import TYPE_CHECKING
from holidays.calendars.chinese import VIETNAMESE_CALENDAR
from holidays.calendars.gregorian import (
JAN,
FEB,
APR,
MAY,
SEP,
DEC,
MON,
TUE,
WED,
THU,
FRI,
SAT,
SUN,
_timedelta,
)
from holidays.groups import ChineseCalendarHolidays, InternationalHolidays, StaticHolidays
from holidays.observed_holiday_base import (
ObservedHolidayBase,
ObservedRule,
SAT_TO_PREV_WORKDAY,
SUN_TO_NEXT_WORKDAY,
SAT_SUN_TO_NEXT_WORKDAY,
)
if TYPE_CHECKING:
from datetime import date
NATIONAL_DAY_RULE = ObservedRule({MON: +1, TUE: -1, WED: -1, THU: +1, FRI: -1, SAT: -1, SUN: +1})
class Vietnam(ObservedHolidayBase, ChineseCalendarHolidays, InternationalHolidays, StaticHolidays):
"""Vietnam holidays.
References:
* [Labor Code 1994 (Art. 73) (en)](https://web.archive.org/web/20160630110506/http://vbpl.vn/TW/Pages/vbpqen-toanvan.aspx?ItemID=2835)
* [Labor Code 2012 (Art. 115) (en)](https://web.archive.org/web/20240706232343/http://vbpl.vn/TW/Pages/vbpqen-toanvan.aspx?ItemID=11013)
* [Labor Code 2012 (Art. 115) (vi)](https://web.archive.org/web/20240917113133/https://vbpl.vn/TW/Pages/vbpq-toanvan.aspx?ItemID=27615)
* [Labor Code 2019 (Art. 112) (en)](https://web.archive.org/web/20250108181808/https://vbpl.vn/TW/pages/vbpqen-toanvan.aspx?ItemID=11135)
* [Labor Code 2019 (Art. 112) (vi)](https://web.archive.org/web/20250221171552/https://vbpl.vn/TW/Pages/vbpq-van-ban-goc.aspx?ItemID=139264)
"""
country = "VN"
# %s (estimated).
estimated_label = tr("%s (dự kiến)")
# %s (observed, estimated).
observed_estimated_label = tr("%s (nghỉ bù, dự kiến)")
# %s (observed).
observed_label = tr("%s (nghỉ bù)")
default_language = "vi"
supported_languages = ("en_US", "th", "vi")
def __init__(self, *args, **kwargs):
ChineseCalendarHolidays.__init__(self, calendar=VIETNAMESE_CALENDAR)
InternationalHolidays.__init__(self)
StaticHolidays.__init__(self, VietnamStaticHolidays)
kwargs.setdefault("observed_rule", SAT_SUN_TO_NEXT_WORKDAY)
kwargs.setdefault("observed_since", 1995)
super().__init__(*args, **kwargs)
def _add_lunar_new_year_observed(self, dt_lny: date) -> None:
if self._year <= 1994:
return None
day_names = {
# 29 of Lunar New Year.
-2: tr("29 Tết"),
# Fourth Day of Lunar New Year.
3: tr("Mùng bốn Tết Nguyên Đán"),
# Fifth Day of Lunar New Year.
4: tr("Mùng năm Tết Nguyên Đán"),
# Sixth Day of Lunar New Year.
5: tr("Mùng sáu Tết Nguyên Đán"),
}
for delta in range(-1, 4 if self._year >= 2013 else 3):
dt = _timedelta(dt_lny, delta)
dt_observed = self._get_observed_date(
dt,
rule=(
SAT_TO_PREV_WORKDAY + SUN_TO_NEXT_WORKDAY
if self._year >= 2014
else SAT_SUN_TO_NEXT_WORKDAY
),
)
if dt_observed != dt:
self._add_holiday(
day_names[(dt_observed - dt_lny).days], # type: ignore[operator]
dt_observed,
)
def _populate_public_holidays(self):
dts_observed = set()
# New Year's Day.
dts_observed.add(self._add_new_years_day(tr("Tết Dương lịch")))
# Lunar New Year's Eve.
self._add_chinese_new_years_eve(tr("Giao thừa Tết Nguyên Đán"))
# Lunar New Year.
lny = self._add_chinese_new_years_day(tr("Tết Nguyên Đán"))
# Second Day of Lunar New Year.
self._add_chinese_new_years_day_two(tr("Mùng hai Tết Nguyên Đán"))
# Third Day of Lunar New Year.
self._add_chinese_new_years_day_three(tr("Mùng ba Tết Nguyên Đán"))
if self._year >= 2013:
# Fourth Day of Lunar New Year.
self._add_chinese_new_years_day_four(tr("Mùng bốn Tết Nguyên Đán"))
if self._year >= 2007:
# Hung Kings' Commemoration Day.
dts_observed.add(self._add_hung_kings_day(tr("Ngày Giỗ Tổ Hùng Vương")))
# Liberation Day/Reunification Day.
dts_observed.add(self._add_holiday_apr_30(tr("Ngày Chiến thắng")))
# International Labor Day.
dts_observed.add(self._add_labor_day(tr("Ngày Quốc tế Lao động")))
# National Day.
name = tr("Quốc khánh")
dts_observed.add(sep_2 := self._add_holiday_sep_2(name))
if self._year >= 2021:
self._add_holiday(name, self._get_observed_date(sep_2, NATIONAL_DAY_RULE))
if self.observed:
self._add_lunar_new_year_observed(lny)
self._populate_observed(dts_observed)
class VN(Vietnam):
pass
class VNM(Vietnam):
pass
class VietnamStaticHolidays:
"""Vietnam special holidays.
References:
* [2018-2019](https://web.archive.org/web/20250427182343/https://thuvienphapluat.vn/cong-van/EN/Lao-dong-Tien-luong/Official-Dispatch-6519-VPCP-KGVX-2018-national-holidays-for-public-sector-employees/387625/tieng-anh.aspx)
* [2024](https://web.archive.org/web/20241002165957/https://thuvienphapluat.vn/cong-van/EN/Lao-dong-Tien-luong/Official-Dispatch-2450-VPCP-KGVX-2024-swap-of-working-days-during-the-Reunification-Day/606458/tieng-anh.aspx)
"""
# Date format (see strftime() Format Codes).
substituted_date_format = tr("%d/%m/%Y")
# Day off (substituted from %s).
substituted_label = tr("Ngày nghỉ (thay cho ngày %s)")
special_public_holidays = {
2010: (FEB, 19, FEB, 27),
2012: (JAN, 27, FEB, 4),
2013: (APR, 29, MAY, 4),
2014: (
(MAY, 2, APR, 26),
(SEP, 1, SEP, 6),
),
2015: (
(JAN, 2, DEC, 27, 2014),
(FEB, 16, FEB, 14),
(APR, 29, APR, 25),
),
2018: (DEC, 31, JAN, 5, 2019),
2019: (APR, 29, MAY, 4),
2024: (APR, 29, MAY, 4),
}
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